Sheet-metal radiator.



PATBNTED OGT.'27, 1903. W. R. KINNEAR.

SHEET METAL RADIATOR. APPLICATION FILED mm. 17, 1903.

MW v

W affmucq a m: mums PETERS co., PHDTO-LITNO., WASHVNGTON, n. n,

UNITED STATES Patented October 27, 1903.

PAT NT *FFICE.

SH EET-Nl E'iAL RADIATOR.

SPECIFICATION formingpart of Letters Patent No.'742,'794', dated October 27, 1903. i

Application filed February 17, 1903. Serial No. 143,785.

T0 at whom it may concern:

Be it known that I, WILLIAM R. KINNEAR, a citizen of the United States, residing at Golumbus, in the county of Franklin, State of Ohio, have invented certain new and useful Improvements in Sheet-Metal Radiators, of which the following is a specification.

My invention relates to a sheet-metal radiator of the same general type as that described in my application, filed January 20, 1903, Serial No. 139,770--to wit, a sheet-metal radiator formed of two tubular members assembled one within the other with a suitable space between them for a heating medium and having the adjacent edges of the respective members at opposite ends of the structure brought together and united by a suitable seam, so as to form an annular, elliptical, or other shaped chamber with a central air-heating flue. In radiators of this character, and particularly those in which the heating medium is conducted to and from this chamber at the same end of the radiator, it is desirable to have a communication between opposite points in the annular or other shaped chamber, such communication to extend across or through the central air-heating flue. Such communication is primarily intended to establish a better circulation within the radiator. It serves the very important additional function, however, of increasing the radiating-surface, and this by means of a wall which intercepts the rising current of heated air, deflecting it in its pas sage and causing it to have more intimate contact with the heating-walls within the airheating fine. I have also devised certain improvements in the construction of joint preferably, though not necessarily, used in forming the passage between opposite sides of the chamber.

The several features of my invention will be fully understood by reference to the accompanying drawings, in which- Figure 1 is a side elevation of a radiator composed of a plurality of units. Fig. 2 is a vertical longitudinal section, on an enlarged scale, through a portion of such a radiator. Fig. 3 is a vertical section through one unit in a plane at right angles to the plane of Fig. 2.

Referring to Figs. 1 and 2, A B O X repre- (No model.)

units ofa radiator having end connections D E for conducting the heatconveying medium to and from the radiator and intermediate connections F F between opposed walls of adjacent units. Each of these units is also provided with an intermediate connection or passage G, the application of which to the radiator, as well as its construction, forms one of the features of my present invention. Each unit is constructed of an outer tubular member 1 and an inner tubular member 2, assembled with the outer member in such manner as to leave a chamber 3 between them, these tubular members having their adjacent edges at opposite ends brought together-as, for instance, by forming a shoulder 4 on the inner member-and united by a suitableseam-such, for instance, as that shown at 5. A radiator or radiator unit constructed in this manner provides an inner air-heating flue 6, through which air passes in contact with the inner walls, thereby becoming heated, so as to greatly increase the heating capacity of the radiator. In providing the radiator or unit with the passage G, forming a feature of my present invention, the inner tube 2, before it is assembled with the outer tube, is put into a suitable press and has struck up from its opposite walls or from points that will be opposed, if the tube is'made from a sheet, the inwardly-projecting'flanges 7 8, which are united by a seam 9, formed by a groove 10 and interlocking tongue 11.

The shape of the tubes 1 and 2 may be varied at will. I have shown them elliptical, which form I prefer, with the passage G, which forms a communication between opposite points in the chamber, circular, though it might be elliptical, with its major axis extending in the direction of the major axis of the elliptical radiator and with its minor axis extending longitudinally of the radiator. This is a matter of choice, however, or else will be dictated by circumstances and is not of the essence of my invention.

By referring to Fig. 2 it will be observed that the air-heating flue 6 is provided on opposite sides of the passage G, and hence the air passing up through this flue impinges the passage G, which, aside from the fact that the walls of said passage greatly increase the sent a series of feet by causing permits the insertion of a tool outer tubular air-heating surface, increases the heating efdeflection, and consequently greater impingement of the air.

The connections F are preferably in the same line with the connections G to give a through circulation and may be made'circular, as shown in Fig. 3. These connections F may consist of any suitable constructionsuch, for instance, as that shown consisting of two overlapping flanges 12 13, struck up from the outer walls of adjacent units, fitted one within the other and secured by interlocking groove 14 and rib 15. This form of joint is well adapted for a radiator of the present construction, because the opening G which is neces sarily introduced in forming this joint. As there is no opening G at bottom, some other form of joint, such as F, must be used in that place.

Having thus described my invention, the following is What I claim as new therein:

1. A radiator constructed with inner and walls spaced apart, with a closed chamber between them, and an interior air-heating flue; said radiator having a passage between opposite points in the closed chamber, extending across the air-heating flue.

2. A radiator composed of a plurality of units, each constructed With inner and outer conforming tubular walls, with a closed annular chamber between them, and a central air-heating flue open at opposite ends; said radiator having con meeting-passages between adjacent units, and passages in line with said connecting-passages, extending across the air-heating flue between opposite points of the closed chamber in the respective units.

3. A radiator composed of a plurality of units, each constructed with tubular walls,

with a closed annular chamber between them,

and a central air-heating flue open at opposite ends; said radiator having connectingpassages between adjacent units, and passages in line with said connecting-passages, extending across the air-heating flue between opposite points of the closed chamber in the respective units, also suitable inlet and outlet for the heating medium, the outlet being at the opposite end of the radiator from the communicating passages.

4. A sheet-metal radiator constructed of adjacent edges at opposite points connected two tubular members assembled with a space between them and having their ends connected to close said space; said radiator having an air-heating flue extending through it and having opposite walls of the inner member struck up to form flanges and having said flanges united to form a passage across the air-flue.

5. A sheet-metal radiator constructed with outer and inner tubular members assembled with a space between them, and having their to form a closed chamber of said space; the inner member providing a central air-flue, and having its opposite Walls struck up to form transverse flanges projecting toward each other and united by a suitable joint to make a tight communication between opposite points in the interior chamber.

6. A sheet-metal radiator constructed with outer and inner tubular members assembled with a space between them, and having their adjacent edges at opposite points connected to form a closed chamber of said space; the inner member providing a central air-flue, and having its opposite walls struck up to form transverse flanges projecting toward each other and united byatongue-and-groove joint to make a tight connection between opposite points in the interior chamber.

7. A sheet-metal radiator constructed with outer and inner tubular members, assembled with a space between them, and an air-heating flue within the inner member; the inner member being provided with a passage for the heating medium extending across the airheating flue from wall to wall of said inner member, and said passage being constructed of inturned flanges struck up from the opposite walls to be connected, projecting toward each other and formed respectively into a tongue and groove at the plane in which they meet, said tongue and groove projecting radially inward with respect to the flanges and being interengaged to hold the flanges together.

The foregoing specification signed this 30th I00 day of January, 1903.

WILLIAM R. KINN EAR.

In presence of HERVEY S. KNIGHT, EDWIN S. CLARKSON. 

